dm thin: cleanup dead code
Remove unused @data_block parameter from cell_defer.
Change thin_bio_map to use many returns rather than setting a variable.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 2cb81bf..6b9322e 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -510,8 +510,7 @@
/*
* This sends the bios in the cell back to the deferred_bios list.
*/
-static void cell_defer(struct thin_c *tc, struct dm_bio_prison_cell *cell,
- dm_block_t data_block)
+static void cell_defer(struct thin_c *tc, struct dm_bio_prison_cell *cell)
{
struct pool *pool = tc->pool;
unsigned long flags;
@@ -528,12 +527,9 @@
*/
static void cell_defer_no_holder(struct thin_c *tc, struct dm_bio_prison_cell *cell)
{
- struct bio_list bios;
struct pool *pool = tc->pool;
unsigned long flags;
- bio_list_init(&bios);
-
spin_lock_irqsave(&pool->lock, flags);
dm_cell_release_no_holder(cell, &pool->deferred_bios);
spin_unlock_irqrestore(&pool->lock, flags);
@@ -586,7 +582,7 @@
cell_defer_no_holder(tc, m->cell);
bio_endio(bio, 0);
} else
- cell_defer(tc, m->cell, m->data_block);
+ cell_defer(tc, m->cell);
out:
list_del(&m->list);
@@ -1447,8 +1443,7 @@
* of doing so. Just error it.
*/
bio_io_error(bio);
- r = DM_MAPIO_SUBMITTED;
- break;
+ return DM_MAPIO_SUBMITTED;
}
/* fall through */
@@ -1458,8 +1453,7 @@
* provide the hint to load the metadata into cache.
*/
thin_defer_bio(tc, bio);
- r = DM_MAPIO_SUBMITTED;
- break;
+ return DM_MAPIO_SUBMITTED;
default:
/*
@@ -1468,11 +1462,8 @@
* pool is switched to fail-io mode.
*/
bio_io_error(bio);
- r = DM_MAPIO_SUBMITTED;
- break;
+ return DM_MAPIO_SUBMITTED;
}
-
- return r;
}
static int pool_is_congested(struct dm_target_callbacks *cb, int bdi_bits)